$287+ Cheap flights from Houston to Porto (OPO)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/20. Fares are subject to change and may not be available on all flights or dates of travel.
HOU — OPO
Sep 3 — Sep 101
Round-trip
1 adult, Economy
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Find cheap flights from Houston to Porto with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Houston to Porto
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Cheapest flights from Houston to PortoExplore the most affordable flight options available from Houston to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 4, 2026.
Explore the most affordable flight options available from Houston to Porto. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 4, 2026.
This Expedia deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1511:50 am -
2 stops18h 15m
Fri 11/2012:35 pm -
2 stops17h 55m
Deal found 7/31![Multiple Airlines logo]()
$701
This Expedia deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/811:50 am -
2 stops41h 25m
Fri 11/136:00 am -
2 stops19h 10m
Deal found 8/3![Multiple Airlines logo]()
$703
This United Airlines deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/711:00 am -
1 stop16h 30m
Fri 12/116:00 am -
1 stop18h 15m
Deal found 8/3![United Airlines logo]()
$707
This Air France deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/27:10 pm -
1 stop20h 50m
Fri 11/65:00 am -
1 stop14h 05m
Deal found 7/31![Multiple Airlines logo]()
$708
This KLM deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/87:10 pm -
1 stop20h 50m
Fri 11/135:00 am -
1 stop14h 05m
Deal found 8/4![KLM logo]()
$709
This Expedia deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/84:10 pm -
1 stop13h 35m
Fri 11/136:15 am -
2 stops23h 03m
Deal found 8/3![Lufthansa logo]()
$711
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/211:22 am -
2 stops17h 13m
Fri 11/65:00 am -
1 stop14h 05m
Deal found 7/31![Delta logo]()
$712
This United Airlines deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/87:30 am -
1 stop20h 00m
Fri 11/136:00 am -
2 stops22h 43m
Deal found 8/4![United Airlines logo]()
$717
This United Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/28:38 pm -
2 stops30h 52m
Fri 11/66:00 am -
2 stops22h 43m
Deal found 7/31![United Airlines logo]()
$721
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/1510:25 am -
2 stops18h 10m
Fri 11/205:00 am -
2 stops24h 13m
Deal found 7/31![Delta logo]()
$722
This Delta deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:00 am -
2 stops21h 05m
Thu 12/35:00 am -
2 stops24h 13m
Deal found 8/2![Delta logo]()
$773
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/302:25 pm -
2 stops19h 00m
Tue 11/35:00 am -
2 stops17h 32m
Deal found 7/31![Delta logo]()
$832
Best flights from Houston to PortoDiscover carefully curated flight deals from Houston to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 4, 2026.
Discover carefully curated flight deals from Houston to Porto that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 4, 2026.
This United Airlines deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/24:10 pm -
1 stop13h 35m
Fri 11/66:00 am -
2 stops21h 27m
Deal found 8/1![United Airlines logo]()
$731
This Expedia deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2010:00 am -
1 stop15h 00m
Tue 10/2712:35 pm -
1 stop31h 25m
Deal found 7/30![Multiple Airlines logo]()
$810
This Delta deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:09 am -
2 stops22h 21m
Tue 10/2711:15 am -
2 stops27h 53m
Deal found 7/30![Delta logo]()
$832
This Turkish Airlines deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/159:15 pm -
1 stop36h 25m
Wed 9/234:40 pm -
1 stop32h 40m
Deal found 8/4![Turkish Airlines logo]()
$837
This United Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/154:10 pm -
1 stop13h 35m
Fri 11/2012:35 pm -
1 stop14h 52m
Deal found 7/31![United Airlines logo]()
$740
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/63:09 pm -
2 stops18h 16m
Tue 11/35:00 am -
2 stops17h 32m
Deal found 7/31![Delta logo]()
$832
This Turkish Airlines deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/22:30 pm -
1 stop19h 10m
Thu 10/294:25 pm -
1 stop32h 40m
Deal found 7/31![Turkish Airlines logo]()
$906
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/302:25 pm -
2 stops19h 00m
Tue 11/35:00 am -
2 stops17h 32m
Deal found 7/31![Delta logo]()
$832
This United Airlines deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1610:00 am -
1 stop15h 10m
Tue 10/2011:15 am -
2 stops34h 23m
Deal found 8/1![United Airlines logo]()
$864
This Turkish Airlines deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/149:15 pm -
1 stop36h 25m
Thu 8/276:10 am -
1 stop19h 10m
Deal found 8/2![Turkish Airlines logo]()
$907
This United Airlines deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1610:00 am -
1 stop15h 10m
Wed 10/216:00 am -
1 stop17h 50m
Deal found 8/1![United Airlines logo]()
$866
This KLM deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/145:20 pm -
2 stops16h 05m
Fri 8/215:55 am -
2 stops16h 30m
Deal found 8/2![Multiple Airlines logo]()
$1,048
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/25:20 pm -
2 stops18h 50m
Fri 10/3011:15 am -
2 stops27h 53m
Deal found 7/31![Delta logo]()
$945
This United Airlines deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/152:50 pm -
1 stop12h 55m
Thu 9/2411:50 am -
2 stops33h 03m
Deal found 8/4![United Airlines logo]()
$914
This Delta deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/121:13 pm -
2 stops20h 12m
Wed 8/265:00 am -
2 stops23h 05m
Deal found 8/3![Delta logo]()
$981
This Delta deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/191:13 pm -
2 stops20h 12m
Tue 8/255:00 am -
2 stops23h 05m
Deal found 8/3![Delta logo]()
$981
This Delta deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:26 pm -
2 stops18h 54m
Tue 9/296:15 am -
2 stops22h 24m
Deal found 8/3![Delta logo]()
$993
This Delta deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/105:20 pm -
2 stops16h 05m
Mon 8/245:00 am -
2 stops23h 05m
Deal found 7/30![Delta logo]()
$1,040
This Delta deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/182:25 pm -
2 stops19h 00m
Fri 9/255:00 am -
2 stops23h 39m
Deal found 8/4![Delta logo]()
$1,041
This Delta deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1210:50 am -
2 stops22h 35m
Sun 8/236:30 am -
2 stops21h 35m
Deal found 8/2![Delta logo]()
$1,048
Last-minute flights from Houston to PortoDiscover last-minute flight deals from Houston to Porto. Data last updated August 4, 2026 and is based on user searches.
Discover last-minute flight deals from Houston to Porto. Data last updated August 4, 2026 and is based on user searches.
This Gotogate deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/139:15 pm -
1 stop20h 15m
Thu 8/276:10 am -
1 stop19h 10m
Deal found 8/3![Turkish Airlines logo]()
$830
This Turkish Airlines deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/169:15 pm -
1 stop36h 35m
Thu 8/276:10 am -
1 stop36h 35m
Deal found 8/2![Turkish Airlines logo]()
$867
This Gotogate deal was found by Cheapflights users on 8/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/89:15 pm -
1 stop36h 25m
Tue 9/2910:40 am -
1 stop38h 40m
Deal found 8/3![Turkish Airlines logo]()
$825
This FlightHub deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/159:15 pm -
1 stop30h 45m
Thu 9/2411:00 am -
1 stop38h 20m
Deal found 7/31![Turkish Airlines logo]()
$836
This Turkish Airlines deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/159:15 pm -
1 stop36h 25m
Wed 9/234:40 pm -
1 stop32h 40m
Deal found 8/4![Turkish Airlines logo]()
$837
This Delta deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1511:00 am -
2 stops22h 25m
Wed 9/235:00 am -
2 stops23h 39m
Deal found 8/4![Delta logo]()
$931
This Delta deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/203:55 pm -
1 stop17h 35m
Thu 10/15:00 am -
1 stop14h 20m
Deal found 8/1![Delta logo]()
$866
This Delta deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2211:00 am -
2 stops22h 30m
Tue 9/296:15 am -
2 stops22h 24m
Deal found 8/1![Delta logo]()
$942
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/303:55 pm -
1 stop17h 30m
Mon 11/211:15 am -
1 stop31h 50m
Deal found 7/31![Delta logo]()
$817
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/302:25 pm -
2 stops19h 00m
Tue 11/35:00 am -
2 stops17h 32m
Deal found 7/31![Delta logo]()
$832
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/302:00 pm -
2 stops19h 25m
Wed 10/2811:15 am -
1 stop31h 55m
Deal found 7/31![Delta logo]()
$870
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/302:00 pm -
2 stops19h 25m
Sun 11/111:15 am -
1 stop31h 50m
Deal found 7/31![Delta logo]()
$871
One-way flights from Houston to PortoSearch for one-way flight options from Houston to Porto. Find affordable one-way fares based on user searches. Data last updated August 4, 2026.
Search for one-way flight options from Houston to Porto. Find affordable one-way fares based on user searches. Data last updated August 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2012:21 pm -
3 stops26h 54m
Deal found 7/31![Multiple Airlines logo]()
$287
This Kiwi.com deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/127:42 pm -
2 stops40h 38m
Deal found 8/1![Multiple Airlines logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/12:18 pm -
3 stops51h 02m
Deal found 7/31![Multiple Airlines logo]()
$306
This Kiwi.com deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/66:20 pm -
2 stops59h 15m
Deal found 8/1![Multiple Airlines logo]()
$352
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/309:04 pm -
3 stops40h 06m
Deal found 7/31![Multiple Airlines logo]()
$355
This Kiwi.com deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2911:35 am -
3 stops50h 00m
Deal found 8/1![Multiple Airlines logo]()
$356
This Delta deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2011:12 am -
2 stops17h 18m
Deal found 7/31![Delta logo]()
$463
This Delta deal was found by Cheapflights users on 8/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/65:20 pm -
2 stops19h 45m
Deal found 8/4![Delta logo]()
$472
This FlightHub deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/296:14 pm -
2 stops44h 21m
Deal found 8/1![British Airways logo]()
$497
This Delta deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/16:00 am -
2 stops20h 30m
Deal found 7/30![Delta logo]()
$527
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/205:28 pm -
3 stops45h 52m
Deal found 7/31![Multiple Airlines logo]()
$584
This Justfly.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:34 pm -
2 stops19h 26m
Deal found 7/31![Iberia logo]()
$595
Find flight deals from Houston to Porto
Discover tips and strategies to find the most affordable flight options for your journey from Houston (HO1) to Porto (OPO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 4, 2026.
Round-trip from | $701 (Expedia) |
|---|---|
One-way from | $287 (Kiwi.com) |
Popular in | July |
Cheapest in | November |
Average price | $990 |
Cheapflights Fare Finder
Customize your flight search to find flights from Houston to Porto that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 4, 2026.
Use the filters below to find and compare flights from Houston to Porto that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Mon 11/2
4:10 pm-11:45 am
1 stop13h 35m
Porto
Fri 11/6
6:00 am-9:27 pm
2 stops21h 27m
$731
Quickest round-trip
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Sun 11/15
4:10 pm-11:45 am
1 stop13h 35m
Porto
Fri 11/20
12:35 pm-9:27 pm
1 stop14h 52m
$740
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Tue 10/20
10:00 am-7:00 am
1 stop15h 00m
Porto
Tue 10/27
12:35 pm-3:00 pm
1 stop31h 25m
$810
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Tue 10/20
6:09 am-10:30 am
2 stops22h 21m
Porto
Tue 10/27
11:15 am-10:08 am
2 stops27h 53m
$832
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Tue 10/6
3:09 pm-3:25 pm
2 stops18h 16m
Porto
Tue 11/3
5:00 am-4:32 pm
2 stops17h 32m
$832
HoustonPorto
HOU - OPO
HOUOPO
Houston Hobby
Wed 9/30
2:25 pm-3:25 pm
2 stops19h 00m
Porto
Tue 11/3
5:00 am-4:32 pm
2 stops17h 32m
$832
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Tue 9/15
9:15 pm-3:40 pm
1 stop36h 25m
Porto
Wed 9/23
4:40 pm-7:20 pm
1 stop32h 40m
$837
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Fri 10/16
10:00 am-7:10 am
1 stop15h 10m
Porto
Tue 10/20
11:15 am-3:38 pm
2 stops34h 23m
$864
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Fri 10/16
10:00 am-7:10 am
1 stop15h 10m
Porto
Wed 10/21
6:00 am-5:50 pm
1 stop17h 50m
$866
HoustonPorto
IAH - OPO
IAHOPO
Houston George Bush Intcntl
Fri 10/2
2:30 pm-3:40 pm
1 stop19h 10m
Porto
Thu 10/29
4:25 pm-8:05 pm
1 stop32h 40m
$906
Showing 1-10 of 33 resultsSorted by cheapest first
Best time to book a flight from Houston to Porto
Have a flexible travel schedule? Discover the best time to fly to Porto from Houston with our price prediction graph.
HO1-OPO
IAH-OPO
HOU-OPO
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Houston to Porto
HO1-OPO
IAH-OPO
HOU-OPO
What is the cheapest month to book a flight from Houston to Porto?
Currently, January is the cheapest month in which you can book a flight from Houston to Porto (average of $682). Flying from Houston to Porto in December is currently the most expensive (average of $1,345). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from Houston to Porto?
Airfare is below average for this route at the moment.
Houston to Porto flights typically cost between $760 and $1,439 in November.The cheapest round-trip price found within the last 5 days was $701 on Multiple Airlines (Nov 15-Nov 20).
Reviews of airlines servicing Porto
Get insights into the airlines that provide service to Porto. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Porto. Reviews last updated August 4, 2026.
Peruse reviews from past customers who have flown with KLM and United Airlines from Houston to Porto to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.3
Overall
7.8
Boarding
7.8
Crew
8.4
Comfort
7.7
Entertainment
7.2
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Food
7.3
Overall
7.8
Boarding
7.8
Crew
8.4
Comfort
7.7
Entertainment
7.2
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Food
7.3
Overall
7.8
Boarding
7.8
Crew
8.4
Comfort
7.7
Entertainment
7.2
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Related info for your journey
Find useful and relevant information for your journey from Houston to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Porto?
Book flights to Porto if you plan to visit one of these locationsVila Nova de Gaia
Arcos de Valdevez
Coimbra
Aveiro
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Alternative routes for Houston to Porto
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Complete your trip
Complete your trip to Porto by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Houston to Porto by cabin class
Find flights from Houston to Porto, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Houston and Porto flights
Browse other Houston and Porto flight options. Last updated on August 4, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Porto
Explore flights to Porto departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 4, 2026.
Top 2 airlines flying from Houston to Porto
Discover the top 2 airlines that operate flights from Houston to Porto. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$476 | Average$808 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$626 | Average$1,130 | FlexibilityNo cancel fee | On-time69% |